Biosignal and Biomedical Image Processing phần 9 pot

... rotated image and the origin al image. ) 9. Load a frame of the MRI image ( mri.tif ) and perform a spatial transfor- mation that first expands the image horizontally by 20% then rotates the image by ... input, and realigned images are displayed. % Example 11 .9 Interactive Image Registration % Load a frame of the MRI image (mri.tif) and perform a spatial % transformati...

Ngày tải lên: 06/08/2014, 00:21

... and II, and elliptic filters. Use a cutoff frequency of 200 Hz and assume a sampling fre- quency of 2 kHz. For all filters, the passband ripple should be less than 3 db and the minimum stopband ... of these ranges and is the same length as a . For example, assume you desire a bandstop filter that has a passband between 0 and 100 with a ripple of 0.01, a stopband between 300 and...

Ngày tải lên: 06/08/2014, 00:20

... 285 Advanced Protocols: Block Processing 292 Sliding Neighborhood Operations 293 Distinct Block Operations 298 Problems 301 11 Image Processing: Filters, Transformations, and Registration 303 Spectral ... 388 Magnetic Resonance Imaging 390 Basic Principles 390 Data Acquisition: Pulse Sequences 394 Functional MRI 396 MATLAB Implementation 398 Principal Component and Independen...

Ngày tải lên: 06/08/2014, 00:20

... signal processing algorithms and data that can be used to evaluate a signal processing system under development. The Web is becoming an evermore useful tool in signal and image processing, and a ... a random time series with a narrow bandwidth (left) and broader bandwidth (right). Note the inverse relationship be- tween the autocorrelation function and the spectrum: the broad...

Ngày tải lên: 06/08/2014, 00:20

... time, t 0 , will always be zero, and an appropriate offset time, t 1 , is added during plot- ting. The time and frequency boundaries are calculated using Eqs. (7) and (9) , and the resulting boundaries ... signal and an imaginary part that is the Hilbert Transform of the real signal (Cohen, 198 9). This is the approach used by the MATLAB routine hilbert and the routine hilber on t...

Ngày tải lên: 06/08/2014, 00:20

... depend on the specific problem involved and its formulation may be the most diff icult part o f the a dapti ve sys tem sp ecification (Ste arns and David, 199 6). The inherent stabili ty of FIR fil ... filtering has a number of applications in biosignal processing. It can be used to suppress a narrowband noise source such as 60 Hz that is corrupt- ing a broadband signal. It can also b...

Ngày tải lên: 06/08/2014, 00:20

... four different image classes or encoding schemes are: indexed images, RGB images, intensity images, and binary images. The first two classes are used to store color images. In indexed images, the ... compo- nents. % Example 9. 3 and Figure 9. 12, 9. 13, 9. 14, and 9. 15 % Example of ICA % Create a mixture using three different signals mixed five ways % plus noise % Use this in PC...

Ngày tải lên: 06/08/2014, 00:20

... image I I_add = imadd(I, J); % Adds image I and J (images and/ % or constants) to form image % I_add I_sub = imsubtract(I, J); % Subtracts J from image I I_divide = imdivide(I, J) % Divides image ... imaging) images of the brain from the MATLAB Image Processing Toolbox’s set of stock images. This image is actually a multiframe image consisting of 27 frames as can be dete...

Ngày tải lên: 06/08/2014, 00:20

... upper images were created by thresholding the intensity. The lower left image is a com- bination (logical OR) of the upper images and the lower right image adds a thresholded texture-based image. The ... intensity thresh- olded images are shown in Figure 12.15 (upper images; the upper right image has been inverted). These images are combined in the lower left image. The lower right...

Ngày tải lên: 06/08/2014, 00:21